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What is a capacitor?
A capacitor consists of two pieces of metal separated by a dielectric material
A. Look at the diagram. When the switch is closed, which of the following statements about the capacitor will be true?
The charge on the capacitor will increase and the potential difference across it will increase
When the capacitor is fully charged, the potential difference across it will be:
Equal to the e.m.f. of the cell
The capacitance C of a capacitor that stores a charge Q with a potential difference V is given by:
C=Q/V
B. The unit of capacitance is the Farad. One Farad is equal to:
1CV-1
What will happen to the capacitance if the potential difference is doubled?
The capacitance will stay the same
The diagram below shows a cell and two capacitors.
What can we say about the charge stored by each capacitor in series?
The charge stored by each capacitor is the same
The diagram below shows a cell and two capacitors.
If the capacitors have capacitances of C1 and C2 respectively, what is the total capacitance C across both capacitors?
same equation as resistors in parallel
Select all the correct statements about a capacitor
The negative charge on one plate is equal to the positive charge on the other